It's 1984 all over again (The year, not the book). In 1984 there was this push to put "Today's more complex and complicated car stereos at least (x) amount of inches from the windshield" to clear up people looking at screens while driving. Then it was CBs were included, where the CB couldn't be mounted on the roof. Panasonic was selling roof-mounted radios to combat the "If your radio is located low, you'll need to remove it and install a blank panel or pocket".
This happened before, it will happen again.
As far as people with cell phones - Cell phones or not, 90% of the people behind a wheel today have no goddam business being there. With kids in the back, food being passed around, figuring out how to block Howard Stern from your Sirius box, and playing with the now completely fucking common satellite navigation / radio / logicon displays the Cell phone is a small part in the equation.
It used to be a bigger part of the equation, back when they first started this legislation - But now it's been done for so long, that the effect on people is minimal.
As usual, lawmakers want to correct situations by banning items, instead of banning the actual criminals. "It's not my fault! It's the Cell Phone's fault!"
Fuck them. And fuck the 9th circuit.